What is the connection between Neil Entwistle and Adult Friend Finder?

Neil Entwistle, a British man convicted of murdering his wife and infant daughter in Massachusetts in 2006, was discovered to have had an account with Adult Friend Finder. It was reported during investigations and subsequent trial that he used the online dating service, which is oriented towards casual sexual encounters and swingers, to seek out extramarital relationships. This detail was part of a larger narrative crafted by prosecutors who argued that Entwistle's dissatisfaction with his marriage and financial difficulties led him to commit the murders. His activities on Adult Friend Finder contributed to the portrayal of his character and possible motives during the highly publicized case.